We are travelling in 4 persons, holding Indonesia passport, coming from HK to GZ on 20-Dec

and will take CZ329 from GZ to VANCOUVER on the same day departure flight at 2pm.
At the return, we will arrive in GZ from Vancouver by CZ330 on 05-Jan at 5pm, then our next flight will depart from HK to Singapore on 06-Jan.
Would I apply for 24hr direct transit visa? how and where?
Thanks for your help.